Data Link Connector

Checking DLC
B7
Checking LED

- Switch on ignition.
- Press test button on DLC A.

LED should light when button is pressed.

If LED does not light:

- Check supply from battery as per B8.

If LED lights:

- Check supply from control unit as per B10.





B8
Checking battery supply

- Switch on ignition.

Connect voltmeter between connector terminal 4 and ground.
Instrument should indicate battery voltage.

If reading is correct:

- Check ground terminal as per B9.

If reading is incorrect:

- Check fuse and supply lead for open-circuit as per B2. Wiring






B9
Checking ground terminal

- Switch on ignition.

Connect ohmmeter between connector terminal 8 and ground.
Instrument should indicate approx. 0 Ohms.

If reading is correct:

- Repeat test with new DLC.

If reading is incorrect:

- Check ground terminal and lead for open-circuit as per B2. Wiring






B1O
Checking supply from control module.

- Switch on ignition.

Connect voltmeter between connector terminal 1 and ground.
Connect voltmeter between connector terminal 2 and ground.
Instrument should indicate over 5 V in both cases.

If readings are correct:

- Replace DLC.

if readings are incorrect:

- Check lead between control unit and DLC for open-circuit as per B2 or short-circuit to ground as per B3. Wiring